Marshalltown, IA has a humid continental climate, with hot summers and cold winters. The average daily temperatures range from around 18°F (-7.8°C) in the winter up to 80°F (26.7°C) in the summer months. Rainfall averages around 35 inches (889mm) per year, with most of that falling between May and September. Snowfall is usually light, but there can be occasional heavy snowfalls in the winter months. Overall, Marshalltown has four distinct seasons with mild temperatures throughout the year.
Marshalltown, Iowa gets 36 inches of rain, on average, per year. The US average is 38 inches of rain per year.
Marshalltown averages 26 inches of snow per year. The US average is 28 inches of snow per year.
On average, there are 196 sunny days per year in Marshalltown. The US average is 205 sunny days.
Marshalltown gets some kind of precipitation, on average, 93 days per year. Precipitation is rain, snow, sleet, or hail that falls to the ground. In order for precipitation to be counted you have to get at least .01 inches on the ground to measure.
Weather Highlights
Summer High: the July high is around 84 degrees
Winter Low: the January low is 10
Rain: averages 36 inches of rain a year
Snow: averages 26 inches of snow a year